METHOD FOR WASHING/DESALTING INCINERATION ASH

摘要

PROBLEM TO BE SOLVED: To provide a washing/desalting method which removes water-soluble salts efficiently by washing incineration ash (main ash and soot and dust) produced when combustible waste is incinerated. SOLUTION: Soot and dust produced when the combustible waste is incinerated are incorporated with inorganic powder of 10-200μm in average particle size (can be inorganic powder the average particle size of which is adjusted to be 10-200μm by crushing), and the mixture is incorporated with water to make slurry. The slurry is separated into inorganic solids and an aqueous solution in which salts are dissolved by a solid-liquid separation process using a filter. Thereby the lowering of filtration efficiency by the clogging of the filter is prevented to accomplish efficient washing/desalting. A mixture of soot and dust with chlorine components reduced and the inorganic powder is recycled as a raw material for cement. COPYRIGHT: (C)2005,JPO&NCIPI